<?php

function DateDiff($strDate1,$strDate2)
	 {
				return (strtotime($strDate2) - strtotime($strDate1))/  ( 60 * 60 * 24 );  // 1 day = 60*60*24
	 } 
//echo DateDiff(date("Y-m-d"),"2011-05-12");
echo date('Y-m-d',strtotime("".date("Y-m-d",18425404800)."+1 month"))
?>